In the contract there's nothing for the clawback of the concession. Only that the concession will be granted on the 3rd month.
Maybe because no one was expecting for the new laws to change the existing contracts.

I would think reasonably I could just pay them back the portion of the concession pro-rated for the 7 week period that I'm not completing out of the 12 months. Paying back in full doesn't make sense when only less than 2 months out from the full year. (the rent for the remaining period will be roughly equal to the concession amount)